/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:00:21,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:00:21,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:00:21,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:00:21,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:00:21,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:00:21,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:00:21,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:00:21,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:00:21,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:00:21,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:00:21,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:00:21,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:00:21,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:00:21,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:00:21,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:00:21,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:00:21,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:00:21,714 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:00:21,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:00:21,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:00:21,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:00:21,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:00:21,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:00:21,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:00:21,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:00:21,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:00:21,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:00:21,719 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:00:21,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:00:21,720 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:00:21,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:00:21,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:00:21,720 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:00:21,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:00:21,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:00:21,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:00:21,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:00:21,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:00:21,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:00:21,722 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:00:22,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:00:22,024 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:00:22,027 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:00:22,029 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:00:22,029 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:00:22,030 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 19:00:22,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4f5040d9/71b9cbb035a8400688fe86be40f3f457/FLAG26306d6fd [2020-08-22 19:00:22,615 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:00:22,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 19:00:22,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4f5040d9/71b9cbb035a8400688fe86be40f3f457/FLAG26306d6fd [2020-08-22 19:00:22,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4f5040d9/71b9cbb035a8400688fe86be40f3f457 [2020-08-22 19:00:23,001 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:00:23,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:00:23,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:00:23,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:00:23,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:00:23,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:00:22" (1/1) ... [2020-08-22 19:00:23,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0614b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:00:23, skipping insertion in model container [2020-08-22 19:00:23,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:00:22" (1/1) ... [2020-08-22 19:00:23,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:00:23,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:00:23,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:00:23,248 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:00:23,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:00:23,315 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:00:23,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:00:23 WrapperNode [2020-08-22 19:00:23,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:00:23,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:00:23,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:00:23,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:00:23,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:00:23" (1/1) ... [2020-08-22 19:00:23,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:00:23" (1/1) ... [2020-08-22 19:00:23,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:00:23" (1/1) ... [2020-08-22 19:00:23,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:00:23" (1/1) ... [2020-08-22 19:00:23,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:00:23" (1/1) ... [2020-08-22 19:00:23,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:00:23" (1/1) ... [2020-08-22 19:00:23,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:00:23" (1/1) ... [2020-08-22 19:00:23,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:00:23,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:00:23,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:00:23,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:00:23,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:00:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:00:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:00:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:00:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:00:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:00:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:00:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:00:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:00:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:00:23,973 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:00:23,974 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:00:23,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:00:23 BoogieIcfgContainer [2020-08-22 19:00:23,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:00:23,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:00:23,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:00:23,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:00:23,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:00:22" (1/3) ... [2020-08-22 19:00:23,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75de466b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:00:23, skipping insertion in model container [2020-08-22 19:00:23,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:00:23" (2/3) ... [2020-08-22 19:00:23,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75de466b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:00:23, skipping insertion in model container [2020-08-22 19:00:23,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:00:23" (3/3) ... [2020-08-22 19:00:23,988 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-22 19:00:24,000 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:00:24,008 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:00:24,021 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:00:24,043 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:00:24,044 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:00:24,044 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:00:24,044 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:00:24,044 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:00:24,045 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:00:24,045 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:00:24,045 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:00:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-08-22 19:00:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 19:00:24,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:24,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:24,080 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:24,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1546178992, now seen corresponding path program 1 times [2020-08-22 19:00:24,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:24,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39690995] [2020-08-22 19:00:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:24,157 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:24,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:24,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39690995] [2020-08-22 19:00:24,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:24,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:24,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917191299] [2020-08-22 19:00:24,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:24,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:24,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:24,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:24,394 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 3 states. [2020-08-22 19:00:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:24,501 INFO L93 Difference]: Finished difference Result 279 states and 384 transitions. [2020-08-22 19:00:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:24,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-08-22 19:00:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:24,520 INFO L225 Difference]: With dead ends: 279 [2020-08-22 19:00:24,520 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 19:00:24,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:24,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 19:00:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-08-22 19:00:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-22 19:00:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 252 transitions. [2020-08-22 19:00:24,613 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 252 transitions. Word has length 79 [2020-08-22 19:00:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:24,614 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 252 transitions. [2020-08-22 19:00:24,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 252 transitions. [2020-08-22 19:00:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 19:00:24,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:24,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:24,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:00:24,619 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash 687152074, now seen corresponding path program 1 times [2020-08-22 19:00:24,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:24,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801450714] [2020-08-22 19:00:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:24,623 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:24,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:24,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801450714] [2020-08-22 19:00:24,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:24,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:24,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339250875] [2020-08-22 19:00:24,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:24,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:24,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:24,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:24,726 INFO L87 Difference]: Start difference. First operand 190 states and 252 transitions. Second operand 3 states. [2020-08-22 19:00:24,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:24,814 INFO L93 Difference]: Finished difference Result 466 states and 650 transitions. [2020-08-22 19:00:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:24,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-08-22 19:00:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:24,825 INFO L225 Difference]: With dead ends: 466 [2020-08-22 19:00:24,825 INFO L226 Difference]: Without dead ends: 325 [2020-08-22 19:00:24,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-22 19:00:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2020-08-22 19:00:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-22 19:00:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 442 transitions. [2020-08-22 19:00:24,931 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 442 transitions. Word has length 80 [2020-08-22 19:00:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:24,932 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 442 transitions. [2020-08-22 19:00:24,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 442 transitions. [2020-08-22 19:00:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 19:00:24,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:24,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:24,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:00:24,945 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:24,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1261830773, now seen corresponding path program 1 times [2020-08-22 19:00:24,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:24,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108406039] [2020-08-22 19:00:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:24,950 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:25,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:25,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108406039] [2020-08-22 19:00:25,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:25,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:25,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207317937] [2020-08-22 19:00:25,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:25,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:25,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:25,089 INFO L87 Difference]: Start difference. First operand 323 states and 442 transitions. Second operand 3 states. [2020-08-22 19:00:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:25,138 INFO L93 Difference]: Finished difference Result 397 states and 552 transitions. [2020-08-22 19:00:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:25,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-08-22 19:00:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:25,142 INFO L225 Difference]: With dead ends: 397 [2020-08-22 19:00:25,142 INFO L226 Difference]: Without dead ends: 395 [2020-08-22 19:00:25,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:25,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-08-22 19:00:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 323. [2020-08-22 19:00:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-22 19:00:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 440 transitions. [2020-08-22 19:00:25,174 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 440 transitions. Word has length 80 [2020-08-22 19:00:25,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:25,174 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 440 transitions. [2020-08-22 19:00:25,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:25,175 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 440 transitions. [2020-08-22 19:00:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 19:00:25,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:25,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:25,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:00:25,178 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:25,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:25,178 INFO L82 PathProgramCache]: Analyzing trace with hash 397182858, now seen corresponding path program 1 times [2020-08-22 19:00:25,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:25,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45489559] [2020-08-22 19:00:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:25,181 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:25,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:25,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45489559] [2020-08-22 19:00:25,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:25,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:25,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745936954] [2020-08-22 19:00:25,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:25,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:25,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:25,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:25,242 INFO L87 Difference]: Start difference. First operand 323 states and 440 transitions. Second operand 3 states. [2020-08-22 19:00:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:25,280 INFO L93 Difference]: Finished difference Result 395 states and 546 transitions. [2020-08-22 19:00:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:25,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-08-22 19:00:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:25,284 INFO L225 Difference]: With dead ends: 395 [2020-08-22 19:00:25,284 INFO L226 Difference]: Without dead ends: 393 [2020-08-22 19:00:25,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-08-22 19:00:25,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 323. [2020-08-22 19:00:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-22 19:00:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 438 transitions. [2020-08-22 19:00:25,310 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 438 transitions. Word has length 81 [2020-08-22 19:00:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:25,310 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 438 transitions. [2020-08-22 19:00:25,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 438 transitions. [2020-08-22 19:00:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 19:00:25,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:25,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:25,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:00:25,314 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:25,314 INFO L82 PathProgramCache]: Analyzing trace with hash -172878236, now seen corresponding path program 1 times [2020-08-22 19:00:25,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:25,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105232147] [2020-08-22 19:00:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:25,317 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:25,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:25,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105232147] [2020-08-22 19:00:25,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:25,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:25,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844678074] [2020-08-22 19:00:25,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:25,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:25,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:25,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:25,382 INFO L87 Difference]: Start difference. First operand 323 states and 438 transitions. Second operand 3 states. [2020-08-22 19:00:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:25,450 INFO L93 Difference]: Finished difference Result 859 states and 1200 transitions. [2020-08-22 19:00:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:25,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-08-22 19:00:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:25,456 INFO L225 Difference]: With dead ends: 859 [2020-08-22 19:00:25,457 INFO L226 Difference]: Without dead ends: 585 [2020-08-22 19:00:25,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-08-22 19:00:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 583. [2020-08-22 19:00:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-08-22 19:00:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 802 transitions. [2020-08-22 19:00:25,506 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 802 transitions. Word has length 81 [2020-08-22 19:00:25,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:25,507 INFO L479 AbstractCegarLoop]: Abstraction has 583 states and 802 transitions. [2020-08-22 19:00:25,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:25,507 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 802 transitions. [2020-08-22 19:00:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 19:00:25,509 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:25,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:25,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:00:25,510 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:25,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1064013698, now seen corresponding path program 1 times [2020-08-22 19:00:25,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:25,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232084766] [2020-08-22 19:00:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:25,514 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:25,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:25,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232084766] [2020-08-22 19:00:25,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:25,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:25,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895490620] [2020-08-22 19:00:25,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:25,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:25,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:25,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:25,581 INFO L87 Difference]: Start difference. First operand 583 states and 802 transitions. Second operand 3 states. [2020-08-22 19:00:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:25,703 INFO L93 Difference]: Finished difference Result 1627 states and 2276 transitions. [2020-08-22 19:00:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:25,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-08-22 19:00:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:25,709 INFO L225 Difference]: With dead ends: 1627 [2020-08-22 19:00:25,710 INFO L226 Difference]: Without dead ends: 1093 [2020-08-22 19:00:25,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2020-08-22 19:00:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1091. [2020-08-22 19:00:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-08-22 19:00:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1506 transitions. [2020-08-22 19:00:25,789 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1506 transitions. Word has length 82 [2020-08-22 19:00:25,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:25,793 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1506 transitions. [2020-08-22 19:00:25,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1506 transitions. [2020-08-22 19:00:25,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 19:00:25,804 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:25,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:25,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:00:25,805 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash -637098359, now seen corresponding path program 1 times [2020-08-22 19:00:25,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:25,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900111026] [2020-08-22 19:00:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:25,808 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:25,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:25,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900111026] [2020-08-22 19:00:25,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:25,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:25,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861371910] [2020-08-22 19:00:25,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:25,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:25,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:25,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:25,878 INFO L87 Difference]: Start difference. First operand 1091 states and 1506 transitions. Second operand 3 states. [2020-08-22 19:00:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:25,967 INFO L93 Difference]: Finished difference Result 1343 states and 1876 transitions. [2020-08-22 19:00:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:25,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-08-22 19:00:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:25,976 INFO L225 Difference]: With dead ends: 1343 [2020-08-22 19:00:25,976 INFO L226 Difference]: Without dead ends: 1341 [2020-08-22 19:00:25,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-08-22 19:00:26,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1091. [2020-08-22 19:00:26,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-08-22 19:00:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1498 transitions. [2020-08-22 19:00:26,057 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1498 transitions. Word has length 82 [2020-08-22 19:00:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:26,057 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1498 transitions. [2020-08-22 19:00:26,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1498 transitions. [2020-08-22 19:00:26,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 19:00:26,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:26,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:26,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:00:26,060 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:26,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:26,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1659922654, now seen corresponding path program 1 times [2020-08-22 19:00:26,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:26,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573353590] [2020-08-22 19:00:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:26,064 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:26,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:26,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573353590] [2020-08-22 19:00:26,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:26,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:26,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830319155] [2020-08-22 19:00:26,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:26,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:26,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:26,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:26,161 INFO L87 Difference]: Start difference. First operand 1091 states and 1498 transitions. Second operand 3 states. [2020-08-22 19:00:26,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:26,253 INFO L93 Difference]: Finished difference Result 1335 states and 1852 transitions. [2020-08-22 19:00:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:26,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-08-22 19:00:26,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:26,261 INFO L225 Difference]: With dead ends: 1335 [2020-08-22 19:00:26,261 INFO L226 Difference]: Without dead ends: 1333 [2020-08-22 19:00:26,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2020-08-22 19:00:26,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1091. [2020-08-22 19:00:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2020-08-22 19:00:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1490 transitions. [2020-08-22 19:00:26,341 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1490 transitions. Word has length 83 [2020-08-22 19:00:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:26,341 INFO L479 AbstractCegarLoop]: Abstraction has 1091 states and 1490 transitions. [2020-08-22 19:00:26,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1490 transitions. [2020-08-22 19:00:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 19:00:26,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:26,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:26,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:00:26,344 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:26,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:26,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1375558424, now seen corresponding path program 1 times [2020-08-22 19:00:26,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:26,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589620649] [2020-08-22 19:00:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:26,347 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:26,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:26,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589620649] [2020-08-22 19:00:26,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:26,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:26,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182607314] [2020-08-22 19:00:26,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:26,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:26,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:26,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:26,409 INFO L87 Difference]: Start difference. First operand 1091 states and 1490 transitions. Second operand 3 states. [2020-08-22 19:00:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:26,577 INFO L93 Difference]: Finished difference Result 3127 states and 4308 transitions. [2020-08-22 19:00:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:26,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-08-22 19:00:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:26,588 INFO L225 Difference]: With dead ends: 3127 [2020-08-22 19:00:26,588 INFO L226 Difference]: Without dead ends: 2085 [2020-08-22 19:00:26,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:26,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2020-08-22 19:00:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 2083. [2020-08-22 19:00:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2020-08-22 19:00:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2834 transitions. [2020-08-22 19:00:26,720 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2834 transitions. Word has length 83 [2020-08-22 19:00:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:26,721 INFO L479 AbstractCegarLoop]: Abstraction has 2083 states and 2834 transitions. [2020-08-22 19:00:26,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2834 transitions. [2020-08-22 19:00:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 19:00:26,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:26,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:26,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:00:26,727 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash -146869603, now seen corresponding path program 1 times [2020-08-22 19:00:26,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:26,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184712224] [2020-08-22 19:00:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:26,731 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:26,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:26,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184712224] [2020-08-22 19:00:26,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:26,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:26,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44924157] [2020-08-22 19:00:26,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:26,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:26,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:26,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:26,773 INFO L87 Difference]: Start difference. First operand 2083 states and 2834 transitions. Second operand 3 states. [2020-08-22 19:00:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:26,925 INFO L93 Difference]: Finished difference Result 2535 states and 3476 transitions. [2020-08-22 19:00:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:26,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-08-22 19:00:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:26,940 INFO L225 Difference]: With dead ends: 2535 [2020-08-22 19:00:26,940 INFO L226 Difference]: Without dead ends: 2533 [2020-08-22 19:00:26,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2020-08-22 19:00:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2083. [2020-08-22 19:00:27,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2020-08-22 19:00:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2818 transitions. [2020-08-22 19:00:27,105 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2818 transitions. Word has length 84 [2020-08-22 19:00:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:27,105 INFO L479 AbstractCegarLoop]: Abstraction has 2083 states and 2818 transitions. [2020-08-22 19:00:27,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2818 transitions. [2020-08-22 19:00:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 19:00:27,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:27,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:27,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:00:27,110 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:27,110 INFO L82 PathProgramCache]: Analyzing trace with hash -307116750, now seen corresponding path program 1 times [2020-08-22 19:00:27,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:27,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672907297] [2020-08-22 19:00:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:27,114 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:27,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:27,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672907297] [2020-08-22 19:00:27,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:27,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:27,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685732858] [2020-08-22 19:00:27,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:27,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:27,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:27,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:27,155 INFO L87 Difference]: Start difference. First operand 2083 states and 2818 transitions. Second operand 3 states. [2020-08-22 19:00:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:27,434 INFO L93 Difference]: Finished difference Result 6055 states and 8228 transitions. [2020-08-22 19:00:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:27,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-08-22 19:00:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:27,458 INFO L225 Difference]: With dead ends: 6055 [2020-08-22 19:00:27,459 INFO L226 Difference]: Without dead ends: 4021 [2020-08-22 19:00:27,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2020-08-22 19:00:27,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 4019. [2020-08-22 19:00:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4019 states. [2020-08-22 19:00:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 5394 transitions. [2020-08-22 19:00:27,747 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 5394 transitions. Word has length 84 [2020-08-22 19:00:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:27,748 INFO L479 AbstractCegarLoop]: Abstraction has 4019 states and 5394 transitions. [2020-08-22 19:00:27,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:27,748 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 5394 transitions. [2020-08-22 19:00:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 19:00:27,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:27,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:27,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:00:27,755 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:27,756 INFO L82 PathProgramCache]: Analyzing trace with hash -322854350, now seen corresponding path program 1 times [2020-08-22 19:00:27,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:27,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877324669] [2020-08-22 19:00:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:27,759 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:27,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:27,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877324669] [2020-08-22 19:00:27,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:27,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:27,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567031942] [2020-08-22 19:00:27,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:27,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:27,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:27,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:27,806 INFO L87 Difference]: Start difference. First operand 4019 states and 5394 transitions. Second operand 3 states. [2020-08-22 19:00:28,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:28,090 INFO L93 Difference]: Finished difference Result 4855 states and 6548 transitions. [2020-08-22 19:00:28,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:28,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-08-22 19:00:28,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:28,116 INFO L225 Difference]: With dead ends: 4855 [2020-08-22 19:00:28,116 INFO L226 Difference]: Without dead ends: 4853 [2020-08-22 19:00:28,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:28,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2020-08-22 19:00:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4019. [2020-08-22 19:00:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4019 states. [2020-08-22 19:00:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 5362 transitions. [2020-08-22 19:00:28,413 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 5362 transitions. Word has length 85 [2020-08-22 19:00:28,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:28,413 INFO L479 AbstractCegarLoop]: Abstraction has 4019 states and 5362 transitions. [2020-08-22 19:00:28,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 5362 transitions. [2020-08-22 19:00:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 19:00:28,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:28,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:28,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:00:28,418 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:28,419 INFO L82 PathProgramCache]: Analyzing trace with hash -930439220, now seen corresponding path program 1 times [2020-08-22 19:00:28,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:28,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187966069] [2020-08-22 19:00:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:28,422 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:28,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:28,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187966069] [2020-08-22 19:00:28,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:28,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:28,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065947110] [2020-08-22 19:00:28,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:28,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:28,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:28,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:28,456 INFO L87 Difference]: Start difference. First operand 4019 states and 5362 transitions. Second operand 3 states. [2020-08-22 19:00:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:29,009 INFO L93 Difference]: Finished difference Result 11767 states and 15732 transitions. [2020-08-22 19:00:29,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:29,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-08-22 19:00:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:29,069 INFO L225 Difference]: With dead ends: 11767 [2020-08-22 19:00:29,070 INFO L226 Difference]: Without dead ends: 7797 [2020-08-22 19:00:29,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7797 states. [2020-08-22 19:00:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7797 to 7795. [2020-08-22 19:00:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7795 states. [2020-08-22 19:00:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 10290 transitions. [2020-08-22 19:00:29,660 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 10290 transitions. Word has length 85 [2020-08-22 19:00:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:29,660 INFO L479 AbstractCegarLoop]: Abstraction has 7795 states and 10290 transitions. [2020-08-22 19:00:29,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 10290 transitions. [2020-08-22 19:00:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 19:00:29,667 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:29,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:29,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:00:29,668 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:29,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1483413839, now seen corresponding path program 1 times [2020-08-22 19:00:29,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:29,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138865445] [2020-08-22 19:00:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:29,674 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:29,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:29,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138865445] [2020-08-22 19:00:29,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:29,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:29,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060338338] [2020-08-22 19:00:29,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:29,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:29,708 INFO L87 Difference]: Start difference. First operand 7795 states and 10290 transitions. Second operand 3 states. [2020-08-22 19:00:30,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:30,424 INFO L93 Difference]: Finished difference Result 9335 states and 12340 transitions. [2020-08-22 19:00:30,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:30,425 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-08-22 19:00:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:30,449 INFO L225 Difference]: With dead ends: 9335 [2020-08-22 19:00:30,450 INFO L226 Difference]: Without dead ends: 9333 [2020-08-22 19:00:30,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2020-08-22 19:00:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7795. [2020-08-22 19:00:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7795 states. [2020-08-22 19:00:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 10226 transitions. [2020-08-22 19:00:30,926 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 10226 transitions. Word has length 86 [2020-08-22 19:00:30,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:30,927 INFO L479 AbstractCegarLoop]: Abstraction has 7795 states and 10226 transitions. [2020-08-22 19:00:30,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 10226 transitions. [2020-08-22 19:00:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 19:00:30,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:30,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:30,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:00:30,935 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:30,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1221401062, now seen corresponding path program 1 times [2020-08-22 19:00:30,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:30,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141751905] [2020-08-22 19:00:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:30,938 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:30,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:30,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141751905] [2020-08-22 19:00:30,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:30,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:30,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342949202] [2020-08-22 19:00:30,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:30,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:30,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:30,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:30,974 INFO L87 Difference]: Start difference. First operand 7795 states and 10226 transitions. Second operand 3 states. [2020-08-22 19:00:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:31,878 INFO L93 Difference]: Finished difference Result 22903 states and 30068 transitions. [2020-08-22 19:00:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:31,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-08-22 19:00:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:31,915 INFO L225 Difference]: With dead ends: 22903 [2020-08-22 19:00:31,916 INFO L226 Difference]: Without dead ends: 15157 [2020-08-22 19:00:31,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15157 states. [2020-08-22 19:00:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15157 to 15155. [2020-08-22 19:00:33,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15155 states. [2020-08-22 19:00:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15155 states to 15155 states and 19634 transitions. [2020-08-22 19:00:33,260 INFO L78 Accepts]: Start accepts. Automaton has 15155 states and 19634 transitions. Word has length 86 [2020-08-22 19:00:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:33,260 INFO L479 AbstractCegarLoop]: Abstraction has 15155 states and 19634 transitions. [2020-08-22 19:00:33,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 15155 states and 19634 transitions. [2020-08-22 19:00:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 19:00:33,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:33,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:33,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 19:00:33,272 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:33,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:33,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1193948038, now seen corresponding path program 1 times [2020-08-22 19:00:33,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:33,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100187639] [2020-08-22 19:00:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:33,274 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:33,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:33,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100187639] [2020-08-22 19:00:33,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:33,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:33,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381492578] [2020-08-22 19:00:33,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:33,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:33,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:33,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:33,307 INFO L87 Difference]: Start difference. First operand 15155 states and 19634 transitions. Second operand 3 states. [2020-08-22 19:00:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:34,609 INFO L93 Difference]: Finished difference Result 17975 states and 23220 transitions. [2020-08-22 19:00:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:34,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-08-22 19:00:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:34,644 INFO L225 Difference]: With dead ends: 17975 [2020-08-22 19:00:34,644 INFO L226 Difference]: Without dead ends: 17973 [2020-08-22 19:00:34,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17973 states. [2020-08-22 19:00:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17973 to 15155. [2020-08-22 19:00:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15155 states. [2020-08-22 19:00:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15155 states to 15155 states and 19506 transitions. [2020-08-22 19:00:35,424 INFO L78 Accepts]: Start accepts. Automaton has 15155 states and 19506 transitions. Word has length 87 [2020-08-22 19:00:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:35,424 INFO L479 AbstractCegarLoop]: Abstraction has 15155 states and 19506 transitions. [2020-08-22 19:00:35,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 15155 states and 19506 transitions. [2020-08-22 19:00:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 19:00:35,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:35,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:35,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 19:00:35,434 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:35,434 INFO L82 PathProgramCache]: Analyzing trace with hash -791026560, now seen corresponding path program 1 times [2020-08-22 19:00:35,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:35,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157348419] [2020-08-22 19:00:35,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:35,436 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:35,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:35,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157348419] [2020-08-22 19:00:35,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:35,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:35,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171134857] [2020-08-22 19:00:35,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:35,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:35,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:35,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:35,467 INFO L87 Difference]: Start difference. First operand 15155 states and 19506 transitions. Second operand 3 states. [2020-08-22 19:00:37,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:37,050 INFO L93 Difference]: Finished difference Result 44599 states and 57396 transitions. [2020-08-22 19:00:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:37,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-08-22 19:00:37,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:37,104 INFO L225 Difference]: With dead ends: 44599 [2020-08-22 19:00:37,104 INFO L226 Difference]: Without dead ends: 29493 [2020-08-22 19:00:37,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29493 states. [2020-08-22 19:00:38,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29493 to 29491. [2020-08-22 19:00:38,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29491 states. [2020-08-22 19:00:38,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29491 states to 29491 states and 37426 transitions. [2020-08-22 19:00:38,530 INFO L78 Accepts]: Start accepts. Automaton has 29491 states and 37426 transitions. Word has length 87 [2020-08-22 19:00:38,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:38,531 INFO L479 AbstractCegarLoop]: Abstraction has 29491 states and 37426 transitions. [2020-08-22 19:00:38,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:38,531 INFO L276 IsEmpty]: Start isEmpty. Operand 29491 states and 37426 transitions. [2020-08-22 19:00:38,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 19:00:38,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:38,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:38,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 19:00:38,545 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:38,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1707179323, now seen corresponding path program 1 times [2020-08-22 19:00:38,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:38,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703212757] [2020-08-22 19:00:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:38,547 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:38,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:38,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703212757] [2020-08-22 19:00:38,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:38,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:38,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763366685] [2020-08-22 19:00:38,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:38,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:38,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:38,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:38,581 INFO L87 Difference]: Start difference. First operand 29491 states and 37426 transitions. Second operand 3 states. [2020-08-22 19:00:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:40,465 INFO L93 Difference]: Finished difference Result 34615 states and 43572 transitions. [2020-08-22 19:00:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:40,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-08-22 19:00:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:40,523 INFO L225 Difference]: With dead ends: 34615 [2020-08-22 19:00:40,523 INFO L226 Difference]: Without dead ends: 34613 [2020-08-22 19:00:40,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:40,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34613 states. [2020-08-22 19:00:42,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34613 to 29491. [2020-08-22 19:00:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29491 states. [2020-08-22 19:00:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29491 states to 29491 states and 37170 transitions. [2020-08-22 19:00:42,081 INFO L78 Accepts]: Start accepts. Automaton has 29491 states and 37170 transitions. Word has length 88 [2020-08-22 19:00:42,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:42,081 INFO L479 AbstractCegarLoop]: Abstraction has 29491 states and 37170 transitions. [2020-08-22 19:00:42,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 29491 states and 37170 transitions. [2020-08-22 19:00:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 19:00:42,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:42,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:42,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 19:00:42,092 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1248226970, now seen corresponding path program 1 times [2020-08-22 19:00:42,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:42,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693262979] [2020-08-22 19:00:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:42,095 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:42,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:42,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693262979] [2020-08-22 19:00:42,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:42,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:42,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627778947] [2020-08-22 19:00:42,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:42,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:42,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:42,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:42,129 INFO L87 Difference]: Start difference. First operand 29491 states and 37170 transitions. Second operand 3 states. [2020-08-22 19:00:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:44,532 INFO L93 Difference]: Finished difference Result 86839 states and 109364 transitions. [2020-08-22 19:00:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:44,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-08-22 19:00:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:44,628 INFO L225 Difference]: With dead ends: 86839 [2020-08-22 19:00:44,628 INFO L226 Difference]: Without dead ends: 57397 [2020-08-22 19:00:44,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57397 states. [2020-08-22 19:00:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57397 to 57395. [2020-08-22 19:00:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57395 states. [2020-08-22 19:00:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57395 states to 57395 states and 71218 transitions. [2020-08-22 19:00:48,512 INFO L78 Accepts]: Start accepts. Automaton has 57395 states and 71218 transitions. Word has length 88 [2020-08-22 19:00:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:48,512 INFO L479 AbstractCegarLoop]: Abstraction has 57395 states and 71218 transitions. [2020-08-22 19:00:48,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 57395 states and 71218 transitions. [2020-08-22 19:00:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 19:00:48,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:48,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:48,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 19:00:48,533 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash 40577332, now seen corresponding path program 1 times [2020-08-22 19:00:48,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:48,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135069852] [2020-08-22 19:00:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:48,535 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:48,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:48,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135069852] [2020-08-22 19:00:48,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:48,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:48,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745160191] [2020-08-22 19:00:48,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:48,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:48,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:48,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:48,561 INFO L87 Difference]: Start difference. First operand 57395 states and 71218 transitions. Second operand 3 states. [2020-08-22 19:00:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:00:55,104 INFO L93 Difference]: Finished difference Result 169015 states and 209460 transitions. [2020-08-22 19:00:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:00:55,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-22 19:00:55,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:00:55,252 INFO L225 Difference]: With dead ends: 169015 [2020-08-22 19:00:55,252 INFO L226 Difference]: Without dead ends: 85301 [2020-08-22 19:00:55,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85301 states. [2020-08-22 19:00:59,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85301 to 85299. [2020-08-22 19:00:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85299 states. [2020-08-22 19:00:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85299 states to 85299 states and 103218 transitions. [2020-08-22 19:00:59,668 INFO L78 Accepts]: Start accepts. Automaton has 85299 states and 103218 transitions. Word has length 89 [2020-08-22 19:00:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:00:59,669 INFO L479 AbstractCegarLoop]: Abstraction has 85299 states and 103218 transitions. [2020-08-22 19:00:59,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:00:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 85299 states and 103218 transitions. [2020-08-22 19:00:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 19:00:59,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:00:59,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:00:59,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 19:00:59,694 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:00:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:00:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1447813926, now seen corresponding path program 1 times [2020-08-22 19:00:59,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:00:59,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141198124] [2020-08-22 19:00:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:00:59,696 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:00:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:59,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:00:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:00:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:00:59,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141198124] [2020-08-22 19:00:59,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:00:59,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:00:59,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470626919] [2020-08-22 19:00:59,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:00:59,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:00:59,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:00:59,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:00:59,730 INFO L87 Difference]: Start difference. First operand 85299 states and 103218 transitions. Second operand 3 states. [2020-08-22 19:01:05,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:01:05,001 INFO L93 Difference]: Finished difference Result 94519 states and 112948 transitions. [2020-08-22 19:01:05,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:01:05,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-22 19:01:05,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:01:05,098 INFO L225 Difference]: With dead ends: 94519 [2020-08-22 19:01:05,098 INFO L226 Difference]: Without dead ends: 66613 [2020-08-22 19:01:05,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:01:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66613 states. [2020-08-22 19:01:07,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66613 to 57395. [2020-08-22 19:01:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57395 states. [2020-08-22 19:01:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57395 states to 57395 states and 68658 transitions. [2020-08-22 19:01:07,933 INFO L78 Accepts]: Start accepts. Automaton has 57395 states and 68658 transitions. Word has length 89 [2020-08-22 19:01:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:01:07,933 INFO L479 AbstractCegarLoop]: Abstraction has 57395 states and 68658 transitions. [2020-08-22 19:01:07,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:01:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 57395 states and 68658 transitions. [2020-08-22 19:01:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 19:01:07,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:01:07,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:01:07,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 19:01:07,947 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:01:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:01:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1997420839, now seen corresponding path program 1 times [2020-08-22 19:01:07,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:01:07,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447101292] [2020-08-22 19:01:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:01:07,949 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:01:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:01:07,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:01:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:01:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:01:07,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447101292] [2020-08-22 19:01:07,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:01:07,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:01:07,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048707286] [2020-08-22 19:01:07,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:01:07,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:01:07,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:01:07,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:01:07,977 INFO L87 Difference]: Start difference. First operand 57395 states and 68658 transitions. Second operand 3 states. [2020-08-22 19:01:10,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:01:10,373 INFO L93 Difference]: Finished difference Result 57395 states and 68658 transitions. [2020-08-22 19:01:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:01:10,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-08-22 19:01:10,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:01:10,378 INFO L225 Difference]: With dead ends: 57395 [2020-08-22 19:01:10,378 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:01:10,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:01:10,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:01:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:01:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:01:10,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:01:10,440 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2020-08-22 19:01:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:01:10,441 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:01:10,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:01:10,441 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:01:10,441 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:01:10,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 19:01:10,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:01:16,871 WARN L193 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 2085 DAG size of output: 91 [2020-08-22 19:01:18,403 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 1051 DAG size of output: 15 [2020-08-22 19:01:27,219 WARN L193 SmtUtils]: Spent 8.81 s on a formula simplification. DAG size of input: 3629 DAG size of output: 15 [2020-08-22 19:01:31,003 WARN L193 SmtUtils]: Spent 3.78 s on a formula simplification. DAG size of input: 1071 DAG size of output: 553 [2020-08-22 19:01:37,035 WARN L193 SmtUtils]: Spent 6.02 s on a formula simplification. DAG size of input: 4137 DAG size of output: 3 [2020-08-22 19:01:42,440 WARN L193 SmtUtils]: Spent 5.39 s on a formula simplification. DAG size of input: 2089 DAG size of output: 291 [2020-08-22 19:01:43,149 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 1055 DAG size of output: 35 [2020-08-22 19:01:47,079 WARN L193 SmtUtils]: Spent 3.93 s on a formula simplification. DAG size of input: 2146 DAG size of output: 159 [2020-08-22 19:01:47,948 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 1167 DAG size of output: 57 [2020-08-22 19:01:48,983 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1453 DAG size of output: 25 [2020-08-22 19:02:04,065 WARN L193 SmtUtils]: Spent 15.07 s on a formula simplification. DAG size of input: 2093 DAG size of output: 1067 [2020-08-22 19:02:04,975 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 1059 DAG size of output: 91 [2020-08-22 19:02:12,719 WARN L193 SmtUtils]: Spent 7.74 s on a formula simplification that was a NOOP. DAG size: 1069 [2020-08-22 19:02:20,957 WARN L193 SmtUtils]: Spent 8.23 s on a formula simplification. DAG size of input: 5162 DAG size of output: 7 [2020-08-22 19:02:23,070 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 1078 DAG size of output: 293 [2020-08-22 19:02:25,356 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 2073 DAG size of output: 7 [2020-08-22 19:02:27,338 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 1063 DAG size of output: 291 [2020-08-22 19:02:30,433 WARN L193 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 2193 DAG size of output: 91 [2020-08-22 19:02:31,273 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 1262 DAG size of output: 37 [2020-08-22 19:02:33,351 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 1836 DAG size of output: 17 [2020-08-22 19:02:35,814 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 2079 DAG size of output: 23 [2020-08-22 19:02:42,906 WARN L193 SmtUtils]: Spent 7.09 s on a formula simplification that was a NOOP. DAG size: 1067 [2020-08-22 19:02:46,686 WARN L193 SmtUtils]: Spent 3.78 s on a formula simplification. DAG size of input: 1071 DAG size of output: 553 [2020-08-22 19:02:48,020 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 1089 DAG size of output: 161 [2020-08-22 19:02:50,854 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 2083 DAG size of output: 55 [2020-08-22 19:02:51,431 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 1047 DAG size of output: 7 [2020-08-22 19:02:54,299 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 2288 DAG size of output: 55 [2020-08-22 19:02:55,361 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1453 DAG size of output: 25 [2020-08-22 19:03:01,150 WARN L193 SmtUtils]: Spent 5.79 s on a formula simplification. DAG size of input: 2603 DAG size of output: 11 [2020-08-22 19:03:05,028 WARN L193 SmtUtils]: Spent 3.87 s on a formula simplification. DAG size of input: 2087 DAG size of output: 159 [2020-08-22 19:03:05,657 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 1053 DAG size of output: 23 [2020-08-22 19:03:21,251 WARN L193 SmtUtils]: Spent 15.59 s on a formula simplification. DAG size of input: 2100 DAG size of output: 1067 [2020-08-22 19:03:23,348 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 1078 DAG size of output: 293 [2020-08-22 19:03:24,361 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 1120 DAG size of output: 93 [2020-08-22 19:03:32,713 WARN L193 SmtUtils]: Spent 8.34 s on a formula simplification. DAG size of input: 2091 DAG size of output: 551 [2020-08-22 19:03:33,478 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 55 [2020-08-22 19:03:36,490 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 2479 DAG size of output: 35 [2020-08-22 19:03:38,558 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 1836 DAG size of output: 17 [2020-08-22 19:03:44,936 WARN L193 SmtUtils]: Spent 6.37 s on a formula simplification. DAG size of input: 4137 DAG size of output: 3 [2020-08-22 19:04:16,925 WARN L193 SmtUtils]: Spent 31.98 s on a formula simplification that was a NOOP. DAG size: 2095 [2020-08-22 19:04:25,582 WARN L193 SmtUtils]: Spent 8.65 s on a formula simplification. DAG size of input: 2104 DAG size of output: 551 [2020-08-22 19:04:26,853 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1061 DAG size of output: 159 [2020-08-22 19:04:28,173 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 1089 DAG size of output: 161 [2020-08-22 19:04:29,012 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 1167 DAG size of output: 57 [2020-08-22 19:04:31,444 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 2077 DAG size of output: 15 [2020-08-22 19:04:35,063 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 1065 DAG size of output: 551 [2020-08-22 19:04:39,119 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 2862 DAG size of output: 23 [2020-08-22 19:04:46,942 WARN L193 SmtUtils]: Spent 7.82 s on a formula simplification that was a NOOP. DAG size: 1069 [2020-08-22 19:04:52,884 WARN L193 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 2603 DAG size of output: 11 [2020-08-22 19:04:55,514 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 2081 DAG size of output: 35 [2020-08-22 19:05:00,640 WARN L193 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 2127 DAG size of output: 291 [2020-08-22 19:05:01,628 WARN L193 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 1120 DAG size of output: 93 [2020-08-22 19:05:02,470 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 1262 DAG size of output: 37 [2020-08-22 19:05:03,451 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-08-22 19:05:32,930 WARN L193 SmtUtils]: Spent 29.43 s on a formula simplification that was a NOOP. DAG size: 553 [2020-08-22 19:05:40,920 WARN L193 SmtUtils]: Spent 7.97 s on a formula simplification that was a NOOP. DAG size: 291 [2020-08-22 19:05:41,062 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-08-22 19:05:43,578 WARN L193 SmtUtils]: Spent 2.51 s on a formula simplification that was a NOOP. DAG size: 159 [2020-08-22 19:05:43,962 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-08-22 19:07:21,952 WARN L193 SmtUtils]: Spent 1.63 m on a formula simplification that was a NOOP. DAG size: 1067 [2020-08-22 19:07:22,831 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-08-22 19:09:10,898 WARN L193 SmtUtils]: Spent 1.80 m on a formula simplification that was a NOOP. DAG size: 1069 [2020-08-22 19:09:19,594 WARN L193 SmtUtils]: Spent 8.68 s on a formula simplification that was a NOOP. DAG size: 293 [2020-08-22 19:09:27,505 WARN L193 SmtUtils]: Spent 7.89 s on a formula simplification that was a NOOP. DAG size: 291 [2020-08-22 19:09:28,384 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-08-22 19:09:28,543 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-08-22 19:11:07,602 WARN L193 SmtUtils]: Spent 1.65 m on a formula simplification that was a NOOP. DAG size: 1067 [2020-08-22 19:11:36,871 WARN L193 SmtUtils]: Spent 29.26 s on a formula simplification that was a NOOP. DAG size: 553 [2020-08-22 19:11:39,704 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 161 [2020-08-22 19:11:40,041 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-22 19:11:40,372 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-22 19:11:42,982 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 159 [2020-08-22 19:13:22,150 WARN L193 SmtUtils]: Spent 1.65 m on a formula simplification that was a NOOP. DAG size: 1067 [2020-08-22 19:13:30,886 WARN L193 SmtUtils]: Spent 8.73 s on a formula simplification that was a NOOP. DAG size: 293 [2020-08-22 19:13:31,904 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 93